IMPROVED SCALE CONDITIONING AGENTS

WIPO Patent Application WO2003000464

A3

The present invention provides an improved scale conditioning composition and method that results in improved dissolution and disruption of tube scale, hardened sludge and other deposits composed primarily of highly densified magnetite such as those found in heat exchange vessels. After treatment with the advanced scale conditioning composition, these magnetite rich deposits are more easily removed using known and commercially available high pressure hydro-mechanical cleaning techniques. The present invention further provides effective cleaning in a short period of time and at relatively low temperatures, while reducing the amount of waste produced and reducing the resulting corrosion of carbon and low alloy steel components within the steam generator during the cleaning process.

WO/2021/101682	CLEANING APPARATUS FOR SENSOR
JP2002224875	METHOD FOR TREATING INNER SURFACE OF PIPING
JP5527502	Warm ultra-pure water supply Use point Piping start-up cleaning method

ROOTHAM MICHAEL W
VARRIN ROBERT D JR

PCT/US2002/019353

October 30, 2003

June 18, 2002

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DOMINION ENG INC (US)

B08B9/027; B08B3/08; B08B3/10; C02F5/12; C11D1/66; C11D3/22; C11D3/26; C11D10/02; C23F14/02; C23G1/08; F28G7/00; F28G9/00; G21F9/28; (IPC1-7): C11D1/66

US3996062A	1976-12-07
US4586961A	1986-05-06
US4972805A	1990-11-27
US5764717A	1998-06-09

See also references of EP 1404489A4

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